proc sql; truncate table work.your_dataset; quit; TRUNCATE TABLE语句会删除表中的所有行,但保留表结构。这是SQL中清空表的一种高效方法,但在SAS中并不常用,因为SAS没有原生的TRUNCATE TABLE支持。上面的代码是一个模拟SQL行为的示例,实际上在SAS中需要分两步:先删除数据集,再重新创建结构。 请注意,在执行...
另外宏变量的定义方式有:当宏变量一个表达式,使用:%str() %let print=%str(proc print; run;); (3)%eval() 如果宏变量是数值计算表达式,则需要根据数值类型使用二个不同的宏变量: %eval_r() 用于计算整数例如:%eval_r(1+2) %sysevalf() 用于计算浮点数或者空值例如: %eval_r(1.0+2.3) 还有一种...
AI代码解释 %macroGHDD_split_char(in=,var=,split_len=200,out=,prefix=);proc sql noprint;selectceil(max(length(&var.)-200)/198+1)into:maxn from&in.;run;data&out.(drop=temp_len remain_char temp_char);set&in.;temp_len=0;length&prefix.&prefix.1-&prefix.%eval(&maxn.-1)$200.;...
proc sort data=develop out=develop; by ins; run;proc surveyselect noprint data = develop samprate=.6667 out=develop seed=44444 outall; strata ins; run;proc freq data = develop; tables ins*selected; run;/*创建训练数据和验证数据 */ data train valid; set develop; if selected then o...
最全的SAS9.2函数列表二 第二类函数windows环境下函数；第三类，OpenVMS虚拟内存环境下函数；第四类，z/OS操作环境下函数，
truncate fuzz fuzzy append fuzzys fuzzydeletefzzy fuzzy insert fluzzy fuzzy replace fizzy fuzzy firstdel uzzy fuzzy firstins pfuzzy fuzzy firstrep wuzzy fuzzy several floozy fuzzy;proc print data=words;run; Distance=spedis(query,keyword);
pname=KTRUNCATE(productname,1,length(productname)); run; 3.iml模块 sas的矩阵模块可以和r python的矩阵思想一起学习 参考的文章:SASIML模块与矩阵运算 - 百度文库 用法很详细。 /* 自己用iml写的标准差*/ /* proc iml; use A; read all var _NUM_ into A; close A; ...
40573 EFI, Export Wizard, and Proc Export truncate labels at 32 characters 64-bit Enabled AIX, 64-bit Enabled HP-UX, 64-bit Enabled Solaris, HP-UX IPF, Linux, Linux for x64, Microsoft Windows, OpenVMS on HP Integrity, Solaris for x64 40558 Invoking nested autocall macros using des=...
Through Facility with something like the following code: proc sql; connect to SQLSVR as mydb (datasrc=SQLServeruser = sasuser pass = XXXXXXXXXXX); select * from connection to mydb (select col2, cast(col2 as binary) col2 from test); quit; Variables might have to be expanded as shown...
From the very first edition,The Little SAS Bookalways covered PROC SQL. But it was in an appendix, and over time we noticed that most people ignore appendices. So for this edition, we removed the appendix and added new sections on using PROC SQL to: ...